Environmental and Chronological Factors in the Mesa Verde-Northern Rio Grande Migration

Ahlstrom, Richard V. N.; West, Carla R. Van; Dean, Jeffrey

doi:10.1006/jaar.1995.1007

Cited by 46 publications

(27 citation statements)

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“…Cooler temperatures combined with several major droughts in the 13 th century may have severely limited the ability of the Ancient Puebloans to grow maize (Salzer, 2000b). The importance of colder temperatures as a causal factor for abandonment is supported by research on migration patterns that indicate movement of populations south and east of the Colorado Plateau and off the plateau throughout the 13 th century, with an onset as early as 1200 (Ahlstrom et al, 1995;Dean et al, 1994a;Salzer, 2000b). These results are further supported by pollen analysis on the Colorado Plateau.…”

Section: "The Great Drought" Of the 13 Th Century And The Ancient Puementioning

confidence: 80%

A paleo perspective on hydroclimatic variability in the western United States

Woodhouse

2004

Aquat. Sci.

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Aquatic resources management has become increasingly challenging as human demands on water supplies compete with the needs of natural ecosystems, particularly in arid lands. A wide range of factors, both natural and human, influence aquatic environments, but an important underlying component is climate variability. Instrumental records of hydroclimatic variability from precipitation, streamflow, and snowpack are limited to 100 years or less in most areas of the western U.S., and are too short to provide more than a subset of the full range of natural climate variability. Paleoclimatic proxy data from a variety of sources can be used to extend inAquatic Sciences strumental records of climate back centuries to tens of thousands of years and longer. In this review, four drought events over the past three millennia, each documented with a number of proxy records, illustrate natural hydroclimatic variability characteristics over the western U.S. Although a small sample of paleoclimate data, these four events exemplify the wide range of natural hydroclimatic variability over space and time. Climate is now, and will continue to be, impacted by human activities, but natural climatic variability will likely be an important underlying factor in future climate variability and change.

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Section: "The Great Drought" Of the 13 Th Century And The Ancient Puementioning

confidence: 80%

A paleo perspective on hydroclimatic variability in the western United States

Woodhouse

2004

Aquat. Sci.

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“…Average temperatures have varied by as much as 5.4 °F (3 °C) over periods as short as a few decades (Bradley 1999;Mann and others 1999). Human societies (Ahlstrom and others 1995;Lipe 1995) and the prevalence of fire have been significantly affected by these changes (Bonnicksen 1999;Clark 1990;Swetnam 1993).…”

Section: Changes Over Time______________mentioning

confidence: 99%

Wildland fire in ecosystems: effects of fire on flora

Brown¹,

Smith²

2000

301

156

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_____________________________________This state-of-knowledge review about the effects of fire on flora and fuels can assist land managers with ecosystem and fire management planning and in their efforts to inform others about the ecological role of fire. Chapter topics include fire regime classification, autecological effects of fire, fire regime characteristics and postfire plant community developments in ecosystems throughout the United States and Canada, global climate change, ecological principles of fire regimes, and practical considerations for managing fire in an ecosytem context.

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“…During and after the late-thirteenth-century drought, farmers in the northern Rio Grande region had access to a wider range of agricultural options than did Mesa Verde farmers (Ahlstrom et al 1995). However, tree-cutting minima associated with D4 occur in nearly every other archaeological region within the Figure 9.…”

Section: Consequences Of Megadrought: Aggregation Population Declinementioning

confidence: 99%

Climate Change and Cultural Response in the Prehistoric American Southwest

Benson

Berry²

2009

KIVA

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Comparison of regional tree-ring cutting-date distributions from the southern Colorado Plateau and the Rio Grande region with tree-ring-based reconstructions of the Palmer Drought Severity Index (PDSI) and with the timing of archaeological stage transitions indicates that Southwestern Native American cultures were periodically impacted by major climatic oscillations between A.D. 860 and 1600. Sitespecifi c information indicates that aggregation, abandonment, and out-migration from many archaeological regions occurred during several widespread megadroughts, including the well-documented middle-twelfth-and late-thirteenthcentury droughts. We suggest that the demographic response of southwestern Native Americans to climate variability primarily refl ects their dependence on an inordinately maize-based subsistence regimen within a region in which agriculture was highly sensitive to climate change. RESUMEN La comparación entre las distribuciones de anillos de árboles con fecha de corte de la zona sur de la Colorado Plateau y la región del Río Grande con reconstrucciones basadas en anillos de árboles del Índice Severo de Defi ciencia Palmer (PDSI, por sus siglas en Inglés) y con el momento del período de transición arqueológica, indica que las culturas Nativas

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Environmental and Chronological Factors in the Mesa Verde-Northern Rio Grande Migration

Cited by 46 publications

References 0 publications

A paleo perspective on hydroclimatic variability in the western United States

A paleo perspective on hydroclimatic variability in the western United States

Wildland fire in ecosystems: effects of fire on flora

Climate Change and Cultural Response in the Prehistoric American Southwest

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